Yeah, actually, that's your exact problem with this deck as a whole; you're trying to do too many things at once and weren't willing to properly cut things up to function properly.
Minus most of the tech. Gorz does not gel with continuous trap cards like Call of the Haunted. He is out of there. BLS has four LIGHT targets. One of them (Veiler) you haven't the room to be running. Ditch him, Veiler, and probably the whole milling engine (including card-trooper, not just the Lightsworns)
You have a specific Dump engine for Golem (Dust Knight), and soooo many better things to be running; milling to make this deck work is so wrong and inconsistent.
I also feel I should note Zombies are not the best at keeping hand advantage, so you may want to axe Trag if you find yourself with no enough cards in hand to make the most efficient use of him.
Yoyoyo get you some Summoner Monks! And along with, since he needs food, max out Book of Life (because Godlike) and MST. Summoner Monk INSTANTLY turns into a 3 material Xyz on summon by summoning Gogogo Ghost from your deck, acts as great thinner, and makes good use of the high trap count to make plays in bad situations.
Get you some pyramid turtles! Getting zombie master from deck to start some combos because the opponent poked your face-down? Too good to pass up. Surprisingly decent OTK prevention too. Floaters are good, especially when 5+ cards in your deck can ss them later as further shielding or free Xyz material.
Also, only one golem is too optimistic. Drawing him isn't fun, I know, but losing him to the banish zone is far worse. Run 2.
If you want Plaguespreader tech vs Blue-Blooded Oni tech, go for it. I ran the deck that way for a while; still runs good, still has OTK potential, but with the added bonus of having surprise plays like Revived Ha Des, or Mist Wurm. Tech Mind Control if you insist on him though.
But yeah, basically, you must streamline if you want your deck to be effective. Medley's are bad.
Yeah, 42 cards wut. Like, once in a blue moon, 41-42 has shown to work out fine, but here, I can see obvious unnecessary things; it's not like you were fighting for what to cut.
Dunno what to put here, yet, so I dug up this gem for you to click on. It's good. Read it.